Table 3.
Relative risk ratios from multinomial logistic regression models predicting likelihood of cohabiting or marrying, as a function of duration since first sex (in months): women aged 18–44 whose relationship began within 10 years of the interview
| Model A |
Model B |
Model C |
||||
|---|---|---|---|---|---|---|
| vs. no coresidential union | vs. no coresidential union | vs. no coresidential union | ||||
| Duration of relationship since first sex (months) | ||||||
| <6 months | 1.491 *** | 0.897 | 1.478 *** | 0.880 | 1.448 ** | 0.879 |
| 7–12 months | 1.077 | 1.067 | 1.073 | 1.067 | 1.044 | 1.017 |
| 13–18 months (reference) | ||||||
| 19–24 months | 0.878 | 1.382 | 0.885 | 1.395 | 0.904 | 1.479 |
| 25–30 months | 0.728 † | 0.985 | 0.735 † | 1.015 | 0.765 | 1.116 |
| 31–36 months | 0.744 † | 0.898 | 0.756 † | 0.955 | 0.787 | 1.059 |
| >36 months | 0.487 *** | 1.053 | 0.502 *** | 1.227 | 0.520 *** | 1.548 † |
| Background characteristics | ||||||
| Family structure at age 14 (Ref = Lived with both parents) | ||||||
| Lived with single parent | 0.965 | 0.466 ** | 1.074 | 0.709 | ||
| Lived with step parent | 1.171 † | 0.644 * | 1.179 † | 0.896 | ||
| Lived with no biological parent | 1.009 | 1.008 | 1.091 | 1.476 | ||
| Parents not married at the time of birth | 0.700 *** | 0.347 *** | 0.879 | 0.445 ** | ||
| Mother’s education (Ref = High school degree) | ||||||
| Less than high school | 1.015 | 1.661 * | 1.039 | 1.721 * | ||
| Some college | 1.052 | 0.933 | 1.060 | 0.990 | ||
| College degree | 0.833 * | 1.304 | 0.823 * | 1.366 | ||
| Respondent completed HS by relationship start | 1.017 | 1.504 * | 0.894 | 1.054 | ||
| Race (Ref = Non-Hispanic white) | ||||||
| Black | 0.442 *** | 0.530 * | ||||
| Hispanic | 0.871 | 0.764 | ||||
| Other | 0.967 | 1.582 | ||||
| Relationship history | ||||||
| Age at first sex with most recent partner (Ref=21–24 years old) | ||||||
| <18 | 0.676 ** | 0.331 *** | ||||
| 18–20 | 0.847 † | 0.675 * | ||||
| 25–29 | 1.173 † | 1.260 | ||||
| 30+ | 0.662 ** | 1.398 | ||||
| Year of relationship start (Ref :1996–2000) | ||||||
| 2001–2003 | 1.005 | 1.114 | ||||
| 2004–2006 | 0.895 | 0.731 † | ||||
| 2007–2009 | 0.789 * | 0.732 | ||||
| 2010–2012 | 0.912 | 0.924 | ||||
| Other Relationship Experience | ||||||
| Number of Sexual Partners | 1.005 | 0.871 *** | ||||
| Respondent had prior cohabiting unions | 0.959 | 0.294 *** | ||||
| Respondent had a child prior to current union | 0.790 * | 0.488 † | ||||
| Respondent is pregnant (time-varying) | 2.034 *** | 3.024 *** | ||||
| df | 4 | 26 | 54 | |||
| Number of Observations | 113,834 | 113,834 | 113,834 | |||
Source: 2006–10 NSFG Female respondent file. Women between the ages of 18–44. Note: Current cohabitors, former cohabitors, and married couples who first cohabited are all considered cohabiting. Those who married directly are in the married category. Non-residential sexual relationships serve as the reference group. Underlined terms indicate significant differences between cohabiting and marrying at the p ≤ .05 level.
Note:
***
p<.001
**
p<.01
*
p<.05
†
p<.10
*
Excludes women who had previously been married